EP 3815795 A1 20210505 - MEMBRANE TRANSDUCER WITH IMPROVED BANDWIDTH
Title (en)
MEMBRANE TRANSDUCER WITH IMPROVED BANDWIDTH
Title (de)
MEMBRANWANDLER MIT VERBESSERTER BANDBREITE
Title (fr)
TRANSDUCTEUR À MEMBRANE DOTÉ D'UNE LARGEUR DE BANDE AMÉLIORÉE
Publication
Application
Priority
EP 19206202 A 20191030
Abstract (en)
An effective bandwidth in a membrane based ultrasonic transducer is improved by a control element (C). The control element (C) is disposed on a first side (10a) of a first membrane (10) of the transducer to increase or decrease a displacement amplitude of the first membrane (10) towards the first side (10a) and/or the opposite, second side (10b). This induces a displacement asymmetry (Za<>Zb) in a motion of the first membrane (10) during a first vibration (V1) of the first membrane (10) to the first side (10a) compared to the second side (10b). The displacement asymmetry may result in improved bandwidth.
IPC 8 full level
B06B 1/06 (2006.01)
CPC (source: CN EP US)
B06B 1/0276 (2013.01 - US); B06B 1/06 (2013.01 - CN EP); B06B 1/0603 (2013.01 - US); B06B 1/0614 (2013.01 - CN EP US); B06B 1/0644 (2013.01 - CN EP)
Citation (search report)
- [XYI] EP 2213239 A1 20100804 - HITACHI LTD [JP], et al
- [Y] US 2019181776 A1 20190613 - TUMPOLD DAVID [DE], et al
- [Y] US 2019187102 A1 20190620 - GERARDO CARLOS D [CA], et al
- [Y] US 2013121509 A1 20130516 - HSU SHU-TING [AT], et al
- [Y] US 2017194934 A1 20170706 - SHELTON STEFON [US], et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3815795 A1 20210505; CN 114630718 A 20220614; EP 4051441 A1 20220907; JP 2023500043 A 20230104; US 2024139772 A1 20240502; WO 2021086184 A1 20210506
DOCDB simple family (application)
EP 19206202 A 20191030; CN 202080076479 A 20201029; EP 20800745 A 20201029; JP 2022521975 A 20201029; NL 2020050670 W 20201029; US 202017769276 A 20201029